Quote:
Originally Posted by craigj2k12
Yeah guys I did mean '5' and not '5e', just thought it was odd he has a gigabit card and was only connecting at 100Mb, changed the cable for a CAT 5e and gigabit straight away
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Bad cable. Over the lengths of cable that are supplied with home routers unless the cable is genuinely broken Cat 5 should easily handle 1Gb.
Even if the cable were too long the symptoms are more likely to be PHY errors, not auto-negotiation at 100Mb. One or more of the pairs in the cable was knacked.